Middle name advice

My character is named Meredith (meaning magnificent) and her last name is Finlay (meaning fair hero). I want her middle name to be something unique that means, in general, strong. I've thought about Meredith Ariel Finlay, but I'm not too sure about that.

Norse names containing the meaning "strength/strong"...Gerda is Norse meaning Strong with Spear....Meredith Gerda Finley ?Ingert is also norse meaning Ing's Strength, traditionally it is a boys name but I think its similarity to Ingrid makes this work for a girl...Meredith Ingert Finley?Einar (EYE nahr) is also traditionally a boys name, Norse meaning warrior, strong through the sword. Meredith Einar Finley?